remove duplicate unsorted array and display code example

Example 1: remove duplicates from sorted array

// Java
public int removeDuplicates(int[] nums) {
    if (nums.length == 0) return 0;
    int i = 0;
    for (int j = 1; j < nums.length; j++) {
        if (nums[j] != nums[i]) {
            i++;
            nums[i] = nums[j];
        }
    }
    return i + 1;
}

Example 2: remove duplicates from sorted array

def remove_duplicate(nums: [int]) -> int:
  nums[:] = sorted(set(nums))
  return len(nums)